// 子元素水平垂直居中
@mixin flexCenter {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

// 子元素平均分布
@mixin flexAround {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
}
